Explanation
Loneliness is the most important concern of the poet. In the very opening line he concedes that he is "lonely". In that state he is like a solitary cloud in the sky. His encounter with the daffodils is sudden: a host of golden daffodils fluttering and dancing in the breeze.... appear before him. The sight of the daffodils makes a profound impression on the poet. The daffodils stretch "in an never ending line before him. He is hyperbolical in counting "ten thousand" of them at a glance.
While watching the daffodils, the poet notice that the wave son the lake seem to be dancing as well. Yet the daffodils outdo the waves in their dance. There seems to be much joy as the waves and the daffodils provide the poet pleasant company. In his graduators enjoyment of the natural scene he hardly ponders on its significance to him. On leaving the scene however the poet expects to return to his earlier lonely state, but this is not to be fog whenever he is moody the memory of the scene returns to him and his heart is aglow with relishing the recollection of the sight.